Part 1 : Unit 4 : Building a Still Air Box for Mushroom Cultivation
A still air box is an enclosed workspace that is commonly used in mushroom cultivation to maintain an almost sterile environment during the inoculation of substrates with mushroom spores or spawn.
The SAB is typically made of transparent plastic or acrylic and can be built in various sizes depending on the needs of the cultivator. The box has two holes or ports that allow for the placement of your arms, which are used to manipulate the materials inside the box.
A SAB enables you to work in a clean environment with minimal contaminants, which is vital during the first few cultivation steps, from spore germination to inoculating grain spawn. You want to prevent bacteria, molds and competing fungi spores from contaminating your growing environment and destroying your grow.
To build a Still Air Box, you will make two 4-6″ inch holes in a 60-100 quart clear plastic box using a large heated can. Yes, you got that right. It’s just a big, clear, plastic tub, turned up-side-down, with two holes in it.
The video markers above 👆🏼correspond to the the various Steps in this Unit. Click on them to skip to a Step.
Remove the SAB lid and place the SAB upside down on your table or work surface.
On the broad side of the SAB, take two measurements and mark them with a sharpie: The height for your holes (4-6 inches up) and the distance between the holes (10-12 inches apart), as shown in the diagram on the right.
Positioning the holes correctly will give you comfortable access to work inside the SAB.
Next Unit: Building a Monotub for mushroom cultivation. The next module will walk you through building your own monotub, which is the container used to incubate and fruit the mushrooms.